davebrowne Posted August 21 Share Posted August 21 I have yellow dust inside the right-hand tailpipe? Like rust only lighter in colour? Any ideas what this is? Quote Link to comment Share on other sites More sharing options...
Steve Q Posted August 27 Share Posted August 27 Is it like a sulphur colour? Quote Link to comment Share on other sites More sharing options...
davebrowne Posted August 28 Author Share Posted August 28 Exactly!! Should I be worried? Quote Link to comment Share on other sites More sharing options...
cliffcoggin Posted August 28 Share Posted August 28 I have never heard of such a problem so I did an internet search and found these: https://mechanics.stackexchange.com/questions/48016/what-is-this-yellow-powder-on-my-exhaust-manifold https://www.odyclub.com/threads/what-is-this-yellow-powder-at-the-top-of-the-muffler.372096/ which both seem plausible. As a chemist I can assure you it is not sulphur. Quote Link to comment Share on other sites More sharing options...
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